#include <iostream>

const int ArSize = 8;

int sum_arr(int arr[], int n);

int main()
{
    int cookies[ArSize] = { 1, 2, 4, 8, 16, 32, 64, 128 };

    std::cout << "array address = " << cookies << '\n';
    std::cout << "sizeof cookies = " << sizeof cookies << '\n';
    int sum = sum_arr(cookies, ArSize);
    std::cout << "Total cookies eaten: " << sum << std::endl;

    sum = sum_arr(cookies, 3);
    std::cout << "First three eaters ate " << sum << " cookies.\n";

    sum = sum_arr(cookies + 4, 4);
    std::cout << "Last four eaters ate " << sum << " cookies.\n";

    return 0;
}

int sum_arr(int arr[], int n)
{
    int total = 0;
    std::cout << "arr address = " << arr << '\n';

    std::cout << "sizeof arr = " << sizeof arr << '\n';
    for (int i = 0; i < n; i++)
    {
        total = total + arr[i];
    }
    return total;
}
